Canola and Mustard: Cabbage Seedpod Weevil (Ceutorhynchus obstrictus)

Excerpt from Chapter 7, Field Crop Protection Guide, Order this publication

Table of Contents

1. Integrated Pest Management Options
• cyhalothrin-lambda – Matador 120 EC
2. Related links...

Integrated Pest Management Options

Serious pest in winter canola though can also impact early-planted spring canola. Adult weevils lay eggs directly into the seedpod. Pod feeding by the larvae can cause up to 35% yield loss. Foliar insecticide will not control larvae within the canola pod, therefore insecticide must be applied to adults prior to egg-laying. See the OMAFRA website for more information on biology, scouting techniques and thresholds.

Canola is a valuable honeysource and is utilized by honeybees. Bees also pollinate the crop. If spraying an insecticide, ensure there are no honey-producing hives in your area.

Comments
For adult control only. Ground or aerial application. Apply at bud to early flowering stage. Maximum 1 application per year. Tank-mixing with clay-based fungicides (e.g., Lance or Ronalin) is not recommended, as these fungicides may affect insecticide efficacy. Do not apply within 7 days of harvest.

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Related links...

• Insects
• Canola and Mustard

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